• Category
  • Length Range
    66-115 µm
  • Width Range
    15.9-20.0 µm
  • Striae in 10 µm
    6-7

Identification

Description

Valves are lanceolate with obtusely rounded ends. The axial area is narrow and widens gradually into a more or less circular central area. The central area is about one-half as wide as the valve. The raphe is weakly lateral, with expanded proximal ends that are slightly deflected to the primary side. Striae are radiate, becoming convergent near the ends and more widely spaced at the center. Areolae are coarse and number 19-21 in 10 µm.

Autecology

Navicula peregrina is common in rivers and creeks on the northern Great Plains, where it prefers alkaline and somewhat brackish waters with elevated concentrations of sodium and sulfate. Here it is most often found with Navicymbula pusilla, Navicula salinarum, Ctenophora pulchella, Tabularia fasciculata, Pleurosigma delicatulum, Nitzschia microcephala, Entomoneis paludosa, Biremis circumtexta, Tryblionella hungarica, Mastogloia elliptica, and Fragilaria famelica. Patrick & Reimer (1966) report Navicula peregrina from coastal states (Atlantic, Gulf, Pacific) as well as plains states. Lange-Bertalot (2001) reports this taxon as common in Europe along sea coasts and in brackish inland waters.

Navicula Peregrina Chem 001
Credit: Montana Diatom Database
Abundance-weighted mean values for selected water quality variables measured concurrently with the collection of samples containing Navicula peregrina.

Original Description

P. peregrina, testula anguste lineari- lanceolata, apicibus sensim acutis non constrictis, pinnulis obliquis. Icon!

  • Basionym
    Pinnularia peregrina
  • Author
    Ehrenb. 1843

Original Images

Naperegrina  Orig Ill
Naperegrina  Orig Descr

EMAP Assessment

EMAP Distribution

Navicula Peregrina 40 Copy
Map 40

Response Plots

Navicula Peregrina Copy

Cite This Page

Bahls, L. (2011). Navicula peregrina. In Diatoms of North America. Retrieved June 22, 2018, from https://diatoms.org/species/navicula_peregrina

Responses

The 15 response plots show an environmental variable (x axis) against the relative abundance (y axis) of Navicula peregrina from all the stream reaches where it was present. Note that the relative abundance scale is the same on each plot. Explanation of each environmental variable and units are as follows:

ELEVATION = stream reach elevation (meters)
STRAHLER = distribution plot of the Strahler Stream Order
SLOPE = stream reach gradient (degrees)
W1_HALL = an index that is a measure of streamside (riparian) human activity that ranges from 0 - 10, with a value of 0 indicating of minimal disturbance to a value of 10 indicating severe disturbance.
PHSTVL = pH measured in a sealed syringe sample (pH units)
log_COND = log concentration of specific conductivity (µS/cm)
log_PTL = log concentration of total phosphorus (µg/L)
log_NO3 = log concentration of nitrate (µeq/L)
log_DOC = log concentration of dissolved organic carbon (mg/L)
log_SIO2 = log concentration of silicon (mg/L)
log_NA = log concentration of sodium (µeq/L)
log_HCO3 = log concentration of the bicarbonate ion (µeq/L)
EMBED = percent of the stream substrate that is embedded by sand and fine sediment
log_TURBIDITY = log of turbidity, a measure of cloudiness of water, in nephelometric turbidity units (NTU).
DISTOT = an index of total human disturbance in the watershed that ranges from 1 - 100, with a value of 0 indicating of minimal disturbance to a value of 100 indicating severe disturbance.